Lars Aksel Opsahl <Lars.Opsahl@xxxxxxxx> writes: > Here is the new stackstrace not too much info that helps mee thou. This is probably the reason why "bt" is producing garbage: > BFD: warning: /var/lib/systemd/coredump/core.postmaster.26.6f7d98107f544085a41c6f8b876418d0.298120.1603810048000000 is truncated: expected core file size >= 2326896640, found: 2147483648 So the core file is being truncated at 2GB, but the process image was a little bit larger than that. You need to get a complete core file. First thing I'd check is the "ulimit -c" setting that the postmaster is being started under. I see that systemd is capturing the core dump, so it could also be that there's some systemd configuration you need to adjust ("man systemd-coredump" might help here). regards, tom lane